An analytical solution to study substrate-microbial dynamics in soils
(2013) In Advances in Water Resources 54. p.181-190- Abstract
- We provide an approximate analytical solution for the substrate-microbial dynamics of the organic carbon cycle in natural soils under hydro-climatic variable forcing conditions. The model involves mass balance in two carbon pools: substrate and biomass. The analytical solution is based on a perturbative solution of concentrations, and can properly reproduce the numerical solutions for the full non-linear problem in a system evolving towards a steady state regime governed by the amount of labile carbon supplied to the system. The substrate and the biomass pools exhibit two distinct behaviors depending on whether the amount of carbon supplied is below or above a given threshold. In the latter case, the concentration versus time curves are... (More)
- We provide an approximate analytical solution for the substrate-microbial dynamics of the organic carbon cycle in natural soils under hydro-climatic variable forcing conditions. The model involves mass balance in two carbon pools: substrate and biomass. The analytical solution is based on a perturbative solution of concentrations, and can properly reproduce the numerical solutions for the full non-linear problem in a system evolving towards a steady state regime governed by the amount of labile carbon supplied to the system. The substrate and the biomass pools exhibit two distinct behaviors depending on whether the amount of carbon supplied is below or above a given threshold. In the latter case, the concentration versus time curves are always monotonic. Contrarily, in the former case the C-pool concentrations present oscillations, allowing the reproduction of non-monotonic small-scale biomass concentration data in a natural soil, observed so far only in short-term experiments in the rhizosphere. Our results illustrate the theoretical dependence of oscillations from soil moisture and temperature and how they may be masked at intermediate scales due to the superposition of solutions with spatially variable parameters. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/0d3026e0-dab7-41f4-b094-033e51ccc3d5
- author
- Sanchez-Vila, Xavier ; Rubol, Simonetta ; Brangarí, Albert C. LU and Fernandez-Garcia, Daniel
- publishing date
- 2013-02-21
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Ecohydrology, Carbon cycle, Soil organic matter, Microbial concentration dynamics
- in
- Advances in Water Resources
- volume
- 54
- pages
- 181 - 190
- publisher
- Elsevier
- external identifiers
-
- scopus:84875114558
- ISSN
- 1872-9657
- DOI
- 10.1016/j.advwatres.2013.02.004
- language
- English
- LU publication?
- no
- id
- 0d3026e0-dab7-41f4-b094-033e51ccc3d5
- date added to LUP
- 2018-04-16 14:13:47
- date last changed
- 2022-01-31 02:56:52
@article{0d3026e0-dab7-41f4-b094-033e51ccc3d5, abstract = {{We provide an approximate analytical solution for the substrate-microbial dynamics of the organic carbon cycle in natural soils under hydro-climatic variable forcing conditions. The model involves mass balance in two carbon pools: substrate and biomass. The analytical solution is based on a perturbative solution of concentrations, and can properly reproduce the numerical solutions for the full non-linear problem in a system evolving towards a steady state regime governed by the amount of labile carbon supplied to the system. The substrate and the biomass pools exhibit two distinct behaviors depending on whether the amount of carbon supplied is below or above a given threshold. In the latter case, the concentration versus time curves are always monotonic. Contrarily, in the former case the C-pool concentrations present oscillations, allowing the reproduction of non-monotonic small-scale biomass concentration data in a natural soil, observed so far only in short-term experiments in the rhizosphere. Our results illustrate the theoretical dependence of oscillations from soil moisture and temperature and how they may be masked at intermediate scales due to the superposition of solutions with spatially variable parameters.}}, author = {{Sanchez-Vila, Xavier and Rubol, Simonetta and Brangarí, Albert C. and Fernandez-Garcia, Daniel}}, issn = {{1872-9657}}, keywords = {{Ecohydrology; Carbon cycle; Soil organic matter; Microbial concentration dynamics}}, language = {{eng}}, month = {{02}}, pages = {{181--190}}, publisher = {{Elsevier}}, series = {{Advances in Water Resources}}, title = {{An analytical solution to study substrate-microbial dynamics in soils}}, url = {{http://dx.doi.org/10.1016/j.advwatres.2013.02.004}}, doi = {{10.1016/j.advwatres.2013.02.004}}, volume = {{54}}, year = {{2013}}, }